3640469 has 4 divisors (see below), whose sum is σ = 4160544. Its totient is φ = 3120396.

The previous prime is 3640451. The next prime is 3640471. The reversal of 3640469 is 9640463.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3640469 - 2¹⁶ = 3574933 is a prime.

It is a super-2 number, since 2×3640469² = 26506029079922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3640409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 260027 + ... + 260040.

It is an arithmetic number, because the mean of its divisors is an integer number (1040136).

Almost surely, 2^3640469 is an apocalyptic number.

It is an amenable number.

3640469 is a deficient number, since it is larger than the sum of its proper divisors (520075).

3640469 is an equidigital number, since it uses as much as digits as its factorization.

3640469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520074.

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 3640469 is about 1908.0013102721. The cubic root of 3640469 is about 153.8340400270.

The spelling of 3640469 in words is "three million, six hundred forty thousand, four hundred sixty-nine".